So...my son is 9 years old. Up until this year, he has been receiving Lego sets since he was about 6 but would rip them open, build the guys and then not finish the set. Now he is really unto them finally and I'm trying to piece back together his older sets so he can finish them. Alot of them are still in bags but some aren't. I'm going to post pics of the intact bags I have and would love help identifying them so I can try to find the instructions instead of throwing away tons of $$$. All of them are newer than 5 years...I have a couple that are mega blox and will post those too
Last photo unnumbered bag: 76037-1: Rhino and Sandman Super Villain Team-up
Then combining with the basic 2*4 orange brick, we got 7 sets.
I found these instructions for bag 5 (page 2), and seems to be the one (has the skeleton arms, the single round grey parts, orange/blue brick in it...)
So I'd tend to say that's 21118-1: The Mine Check the instructions maybe others bags can match that box.